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7ac48069 | 1 | /* $Id$ |
73cf66ba | 2 | * |
7ac48069 | 3 | * Check access to queries |
73cf66ba | 4 | * |
7ac48069 | 5 | * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology |
6 | * For copying and distribution information, please see the file | |
7 | * <mit-copyright.h>. | |
73cf66ba | 8 | */ |
9 | ||
73cf66ba | 10 | #include <mit-copyright.h> |
73cf66ba | 11 | #include "mr_server.h" |
7ac48069 | 12 | #include "qrtn.h" |
03c05291 | 13 | #include "query.h" |
7ac48069 | 14 | |
73cf66ba | 15 | #include <ctype.h> |
7ac48069 | 16 | #include <stdlib.h> |
17 | ||
73cf66ba | 18 | EXEC SQL INCLUDE sqlca; |
7ac48069 | 19 | |
20 | RCSID("$Header$"); | |
73cf66ba | 21 | |
22 | extern char *whoami; | |
03c05291 | 23 | extern int dbms_errno, mr_errcode; |
73cf66ba | 24 | |
03c05291 | 25 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); |
73cf66ba | 26 | |
27 | ||
28 | /* Specialized Access Routines */ | |
29 | ||
30 | /* access_user - verify that client name equals specified login name | |
31 | * | |
32 | * - since field validation routines are called first, a users_id is | |
33 | * now in argv[0] instead of the login name. | |
34 | */ | |
35 | ||
5eaef520 | 36 | int access_user(struct query *q, char *argv[], client *cl) |
73cf66ba | 37 | { |
5eaef520 | 38 | if (cl->users_id != *(int *)argv[0]) |
39 | return MR_PERM; | |
40 | else | |
41 | return MR_SUCCESS; | |
73cf66ba | 42 | } |
43 | ||
44 | ||
45 | ||
46 | /* access_login - verify that client name equals specified login name | |
47 | * | |
48 | * argv[0...n] contain search info. q-> | |
49 | */ | |
50 | ||
5eaef520 | 51 | int access_login(struct query *q, char *argv[], client *cl) |
73cf66ba | 52 | { |
5eaef520 | 53 | EXEC SQL BEGIN DECLARE SECTION; |
54 | int id; | |
55 | EXEC SQL END DECLARE SECTION; | |
73cf66ba | 56 | |
5eaef520 | 57 | if (q->argc != 1) |
58 | return MR_ARGS; | |
03c05291 | 59 | |
5eaef520 | 60 | if (!strcmp(q->shortname, "gual")) |
61 | { | |
5906749e | 62 | EXEC SQL SELECT users_id INTO :id FROM users |
cc0ec904 | 63 | WHERE login = :argv[0] AND users_id != 0; |
5eaef520 | 64 | } |
65 | else if (!strcmp(q->shortname, "gubl")) | |
66 | { | |
03c05291 | 67 | EXEC SQL SELECT users_id INTO :id FROM users u |
cc0ec904 | 68 | WHERE u.login = :argv[0] AND u.users_id != 0; |
5eaef520 | 69 | } |
70 | else if (!strcmp(q->shortname, "guau")) | |
71 | { | |
5906749e | 72 | EXEC SQL SELECT users_id INTO :id FROM users |
73 | WHERE unix_uid = :argv[0] AND users_id != 0; | |
5eaef520 | 74 | } |
75 | else if (!strcmp(q->shortname, "gubu")) | |
76 | { | |
03c05291 | 77 | EXEC SQL SELECT users_id INTO :id FROM users u |
78 | WHERE u.unix_uid = :argv[0] AND u.users_id != 0; | |
73cf66ba | 79 | } |
80 | ||
5eaef520 | 81 | if (sqlca.sqlcode == SQL_NO_MATCH) |
82 | return MR_NO_MATCH; /* ought to be MR_USER, but this is what | |
83 | gual returns, so we have to be consistent */ | |
84 | else if (sqlca.sqlerrd[2] != 1 || id != cl->users_id) | |
85 | return MR_PERM; | |
86 | else | |
87 | return MR_SUCCESS; | |
73cf66ba | 88 | } |
89 | ||
90 | ||
f659afb2 | 91 | /* access_spob - check access for set_pobox */ |
92 | ||
93 | int access_spob(struct query *q, char *argv[], client *cl) | |
94 | { | |
95 | if (cl->users_id != *(int *)argv[0] || !strcmp(argv[1], "IMAP")) | |
96 | return MR_PERM; | |
97 | else | |
98 | return MR_SUCCESS; | |
99 | } | |
100 | ||
73cf66ba | 101 | |
102 | /* access_list - check access for most list operations | |
103 | * | |
104 | * Inputs: argv[0] - list_id | |
105 | * q - query name | |
106 | * argv[2] - member ID (only for queries "amtl" and "dmfl") | |
e688520a | 107 | * argv[7] - group ID (only for query "ulis") |
73cf66ba | 108 | * cl - client name |
109 | * | |
110 | * - check that client is a member of the access control list | |
111 | * - OR, if the query is add_member_to_list or delete_member_from_list | |
112 | * and the list is public, allow access if client = member | |
113 | */ | |
114 | ||
5eaef520 | 115 | int access_list(struct query *q, char *argv[], client *cl) |
73cf66ba | 116 | { |
5eaef520 | 117 | EXEC SQL BEGIN DECLARE SECTION; |
118 | int list_id, acl_id, flags, gid, users_id; | |
e688520a | 119 | char acl_type[LIST_ACL_TYPE_SIZE], name[LIST_NAME_SIZE], *newname; |
5eaef520 | 120 | EXEC SQL END DECLARE SECTION; |
121 | int status; | |
122 | ||
123 | list_id = *(int *)argv[0]; | |
17f090e1 | 124 | EXEC SQL SELECT acl_id, acl_type, gid, publicflg, name |
125 | INTO :acl_id, :acl_type, :gid, :flags, :name | |
5eaef520 | 126 | FROM list |
127 | WHERE list_id = :list_id; | |
128 | ||
129 | if (sqlca.sqlerrd[2] != 1) | |
130 | return MR_INTERNAL; | |
131 | ||
132 | /* if amtl or dmfl and list is public allow client to add or delete self */ | |
133 | if (((!strcmp("amtl", q->shortname) && flags) || | |
134 | (!strcmp("dmfl", q->shortname)))) | |
135 | { | |
136 | if (!strcmp("USER", argv[1]) && *(int *)argv[2] == cl->users_id) | |
137 | return MR_SUCCESS; | |
138 | if (!strcmp("KERBEROS", argv[1]) && *(int *)argv[2] == -cl->client_id) | |
139 | return MR_SUCCESS; | |
140 | } /* if update_list, don't allow them to change the GID or rename to | |
141 | a username other than their own */ | |
142 | else if (!strcmp("ulis", q->shortname)) | |
143 | { | |
144 | if (!strcmp(argv[7], UNIQUE_GID)) | |
145 | { | |
146 | if (gid != -1) | |
147 | return MR_PERM; | |
148 | } | |
149 | else | |
150 | { | |
151 | if (gid != atoi(argv[7])) | |
152 | return MR_PERM; | |
153 | } | |
d83ee5a2 | 154 | newname = argv[1]; |
155 | EXEC SQL SELECT users_id INTO :users_id FROM users | |
5eaef520 | 156 | WHERE login = :newname; |
17f090e1 | 157 | if ((sqlca.sqlcode != SQL_NO_MATCH) && strcmp(strtrim(name), newname) && |
158 | (users_id != cl->users_id)) | |
5eaef520 | 159 | return MR_PERM; |
73cf66ba | 160 | } |
161 | ||
5eaef520 | 162 | /* check for client in access control list */ |
163 | status = find_member(acl_type, acl_id, cl); | |
164 | if (!status) | |
165 | return MR_PERM; | |
73cf66ba | 166 | |
5eaef520 | 167 | return MR_SUCCESS; |
73cf66ba | 168 | } |
169 | ||
170 | ||
171 | /* access_visible_list - allow access to list only if it is not hidden, | |
172 | * or if the client is on the ACL | |
173 | * | |
174 | * Inputs: argv[0] - list_id | |
175 | * cl - client identifier | |
176 | */ | |
177 | ||
5eaef520 | 178 | int access_visible_list(struct query *q, char *argv[], client *cl) |
73cf66ba | 179 | { |
5eaef520 | 180 | EXEC SQL BEGIN DECLARE SECTION; |
181 | int list_id, acl_id, flags ; | |
e688520a | 182 | char acl_type[LIST_ACL_TYPE_SIZE]; |
5eaef520 | 183 | EXEC SQL END DECLARE SECTION; |
184 | int status; | |
185 | ||
186 | list_id = *(int *)argv[0]; | |
187 | EXEC SQL SELECT hidden, acl_id, acl_type | |
188 | INTO :flags, :acl_id, :acl_type | |
189 | FROM list | |
190 | WHERE list_id = :list_id; | |
191 | if (sqlca.sqlerrd[2] != 1) | |
192 | return MR_INTERNAL; | |
193 | if (!flags) | |
194 | return MR_SUCCESS; | |
195 | ||
196 | /* check for client in access control list */ | |
197 | status = find_member(acl_type, acl_id, cl); | |
198 | if (!status) | |
199 | return MR_PERM; | |
200 | ||
201 | return MR_SUCCESS; | |
73cf66ba | 202 | } |
203 | ||
204 | ||
205 | /* access_vis_list_by_name - allow access to list only if it is not hidden, | |
206 | * or if the client is on the ACL | |
207 | * | |
208 | * Inputs: argv[0] - list name | |
209 | * cl - client identifier | |
210 | */ | |
211 | ||
5eaef520 | 212 | int access_vis_list_by_name(struct query *q, char *argv[], client *cl) |
73cf66ba | 213 | { |
5eaef520 | 214 | EXEC SQL BEGIN DECLARE SECTION; |
215 | int acl_id, flags, rowcount; | |
e688520a | 216 | char acl_type[LIST_ACL_TYPE_SIZE], *listname; |
5eaef520 | 217 | EXEC SQL END DECLARE SECTION; |
218 | int status; | |
219 | ||
220 | listname = argv[0]; | |
221 | EXEC SQL SELECT hidden, acl_id, acl_type INTO :flags, :acl_id, :acl_type | |
222 | FROM list WHERE name = :listname; | |
223 | ||
224 | rowcount = sqlca.sqlerrd[2]; | |
225 | if (rowcount > 1) | |
226 | return MR_WILDCARD; | |
227 | if (rowcount == 0) | |
228 | return MR_NO_MATCH; | |
229 | if (!flags) | |
230 | return MR_SUCCESS; | |
231 | ||
232 | /* check for client in access control list */ | |
233 | status = find_member(acl_type, acl_id, cl); | |
234 | if (!status) | |
235 | return MR_PERM; | |
236 | ||
237 | return MR_SUCCESS; | |
73cf66ba | 238 | } |
239 | ||
240 | ||
241 | /* access_member - allow user to access member of type "USER" and name matches | |
f3c08a60 | 242 | * username, or to access member of type "KERBEROS" and the principal matches |
243 | * the user, or to access member of type "LIST" and list is one that user is | |
73cf66ba | 244 | * on the acl of, or the list is visible. |
245 | */ | |
246 | ||
5eaef520 | 247 | int access_member(struct query *q, char *argv[], client *cl) |
73cf66ba | 248 | { |
5eaef520 | 249 | if (!strcmp(argv[0], "LIST") || !strcmp(argv[0], "RLIST")) |
250 | return access_visible_list(q, &argv[1], cl); | |
73cf66ba | 251 | |
5eaef520 | 252 | if (!strcmp(argv[0], "USER") || !strcmp(argv[0], "RUSER")) |
253 | { | |
254 | if (cl->users_id == *(int *)argv[1]) | |
255 | return MR_SUCCESS; | |
73cf66ba | 256 | } |
257 | ||
5eaef520 | 258 | if (!strcmp(argv[0], "KERBEROS") || !strcmp(argv[0], "RKERBEROS")) |
259 | { | |
260 | if (cl->client_id == -*(int *)argv[1]) | |
261 | return MR_SUCCESS; | |
73cf66ba | 262 | } |
263 | ||
5eaef520 | 264 | return MR_PERM; |
73cf66ba | 265 | } |
266 | ||
267 | ||
268 | /* access_qgli - special access routine for Qualified_get_lists. Allows | |
269 | * access iff argv[0] == "TRUE" and argv[2] == "FALSE". | |
270 | */ | |
271 | ||
5eaef520 | 272 | int access_qgli(struct query *q, char *argv[], client *cl) |
73cf66ba | 273 | { |
5eaef520 | 274 | if (!strcmp(argv[0], "TRUE") && !strcmp(argv[2], "FALSE")) |
275 | return MR_SUCCESS; | |
276 | return MR_PERM; | |
73cf66ba | 277 | } |
278 | ||
279 | ||
280 | /* access_service - allow access if user is on ACL of service. Don't | |
281 | * allow access if a wildcard is used. | |
282 | */ | |
283 | ||
5eaef520 | 284 | int access_service(struct query *q, char *argv[], client *cl) |
73cf66ba | 285 | { |
5eaef520 | 286 | EXEC SQL BEGIN DECLARE SECTION; |
287 | int acl_id; | |
e688520a | 288 | char *name, acl_type[LIST_ACL_TYPE_SIZE]; |
5eaef520 | 289 | EXEC SQL END DECLARE SECTION; |
290 | int status; | |
291 | char *c; | |
292 | ||
293 | name = argv[0]; | |
294 | for (c = name; *c; c++) | |
295 | { | |
296 | if (islower(*c)) | |
297 | *c = toupper(*c); | |
298 | } | |
299 | EXEC SQL SELECT acl_id, acl_type INTO :acl_id, :acl_type FROM servers | |
300 | WHERE name = :name; | |
301 | if (sqlca.sqlerrd[2] > 1) | |
302 | return MR_PERM; | |
303 | ||
304 | /* check for client in access control list */ | |
305 | status = find_member(acl_type, acl_id, cl); | |
306 | if (!status) | |
307 | return MR_PERM; | |
308 | ||
309 | return MR_SUCCESS; | |
73cf66ba | 310 | } |
311 | ||
312 | ||
313 | /* access_filesys - verify that client is owner or on owners list of filesystem | |
314 | * named by argv[0] | |
315 | */ | |
316 | ||
5eaef520 | 317 | int access_filesys(struct query *q, char *argv[], client *cl) |
73cf66ba | 318 | { |
5eaef520 | 319 | EXEC SQL BEGIN DECLARE SECTION; |
320 | int users_id, list_id; | |
321 | char *name; | |
322 | EXEC SQL END DECLARE SECTION; | |
323 | int status; | |
324 | ||
325 | name = argv[0]; | |
326 | EXEC SQL SELECT owner, owners INTO :users_id, :list_id FROM filesys | |
327 | WHERE label = :name; | |
328 | ||
329 | if (sqlca.sqlerrd[2] != 1) | |
330 | return MR_PERM; | |
331 | if (users_id == cl->users_id) | |
332 | return MR_SUCCESS; | |
333 | status = find_member("LIST", list_id, cl); | |
334 | if (status) | |
335 | return MR_SUCCESS; | |
336 | else | |
337 | return MR_PERM; | |
73cf66ba | 338 | } |
339 | ||
1beb5e23 | 340 | |
341 | /* access_host - successful if owner of host, or subnet containing host | |
342 | */ | |
343 | ||
5eaef520 | 344 | int access_host(struct query *q, char *argv[], client *cl) |
1beb5e23 | 345 | { |
5eaef520 | 346 | EXEC SQL BEGIN DECLARE SECTION; |
347 | int mid, sid, id; | |
e688520a | 348 | char mtype[MACHINE_OWNER_TYPE_SIZE], stype[SUBNET_OWNER_TYPE_SIZE]; |
5eaef520 | 349 | EXEC SQL END DECLARE SECTION; |
350 | int status; | |
351 | ||
17f090e1 | 352 | if (q->type == RETRIEVE) |
353 | { | |
354 | if (strcmp(argv[0], "*") || strcmp(argv[1], "*") || | |
355 | strcmp(argv[2], "*") || strcmp(argv[3], "*")) | |
356 | return MR_SUCCESS; | |
357 | else | |
358 | return MR_PERM; | |
359 | } | |
9e252e6f | 360 | |
5eaef520 | 361 | if (q->type == APPEND) |
362 | { | |
17f090e1 | 363 | /* Non-query owner must set use to zero */ |
364 | if (atoi(argv[6]) != 0) | |
365 | return MR_PERM; | |
366 | ||
9e252e6f | 367 | /* ... and start the hostname with a letter */ |
368 | if (isdigit(argv[0][0])) | |
369 | return MR_BAD_CHAR; | |
370 | ||
5eaef520 | 371 | id = *(int *)argv[8]; |
372 | EXEC SQL SELECT s.owner_type, s.owner_id | |
373 | INTO :stype, :sid FROM subnet s | |
374 | WHERE s.snet_id = :id; | |
375 | mid = 0; | |
17f090e1 | 376 | |
377 | if (find_member(stype, sid, cl)) | |
5eaef520 | 378 | return MR_SUCCESS; |
379 | else | |
380 | return MR_PERM; | |
381 | } | |
17f090e1 | 382 | else /* q-type == UPDATE */ |
5eaef520 | 383 | { |
17f090e1 | 384 | EXEC SQL BEGIN DECLARE SECTION; |
385 | int status, acomment, use, ocomment, snid; | |
e688520a | 386 | char contact[MACHINE_CONTACT_SIZE], address[MACHINE_ADDRESS_SIZE]; |
9e252e6f | 387 | char name[MACHINE_NAME_SIZE]; |
17f090e1 | 388 | EXEC SQL END DECLARE SECTION; |
389 | ||
5eaef520 | 390 | id = *(int *)argv[0]; |
9e252e6f | 391 | EXEC SQL SELECT m.name, m.use, m.contact, m.status, m.address, |
392 | m.owner_type, m.owner_id, m.acomment, m.ocomment, m.snet_id, | |
393 | s.owner_type, s.owner_id INTO :name, :use, :contact, :status, | |
394 | :address, :mtype, :mid, :acomment, :ocomment, :snid, :stype, :sid | |
17f090e1 | 395 | FROM machine m, subnet s |
396 | WHERE m.mach_id = :id AND s.snet_id = m.snet_id; | |
397 | if (dbms_errno) | |
398 | return mr_errcode; | |
399 | ||
400 | /* non-query-owner cannot change use or ocomment */ | |
401 | if ((use != atoi(argv[7])) || (ocomment != *(int *)argv[14])) | |
402 | return MR_PERM; | |
403 | ||
9e252e6f | 404 | /* or rename to start with digit */ |
405 | if (isdigit(argv[1][0]) && strcmp(strtrim(name), argv[1])) | |
406 | return MR_BAD_CHAR; | |
407 | ||
17f090e1 | 408 | if (!find_member(stype, sid, cl)) |
409 | { | |
410 | if (find_member(mtype, mid, cl)) | |
411 | { | |
412 | /* host owner also cannot change contact, status, address, | |
413 | owner, or acomment */ | |
414 | if (strcmp(argv[6], strtrim(contact)) || | |
415 | (status != atoi(argv[8])) || | |
416 | strcmp(argv[10], strtrim(address)) || | |
417 | strcmp(argv[11], strtrim(mtype)) || | |
418 | (mid != *(int *)argv[12]) || (acomment != *(int *)argv[13])) | |
419 | return MR_PERM; | |
420 | } | |
421 | else | |
422 | return MR_PERM; | |
423 | } | |
424 | ||
425 | /* If moving to a new subnet, make sure user is on acl there */ | |
426 | id = *(int *)argv[9]; | |
427 | if (id != snid) | |
428 | { | |
429 | EXEC SQL SELECT owner_type, owner_id INTO :stype, :sid | |
430 | FROM subnet WHERE snet_id=:id; | |
431 | if (!find_member(stype, sid, cl)) | |
432 | return MR_PERM; | |
433 | } | |
5eaef520 | 434 | |
5eaef520 | 435 | return MR_SUCCESS; |
1beb5e23 | 436 | } |
1beb5e23 | 437 | } |
438 | ||
439 | ||
440 | /* access_ahal - check for adding a host alias. | |
441 | * successful if host has less then 2 aliases and (client is owner of | |
442 | * host or subnet). | |
443 | * If deleting an alias, any owner will do. | |
444 | */ | |
445 | ||
5eaef520 | 446 | int access_ahal(struct query *q, char *argv[], client *cl) |
1beb5e23 | 447 | { |
5eaef520 | 448 | EXEC SQL BEGIN DECLARE SECTION; |
449 | int cnt, id, mid, sid; | |
e688520a | 450 | char mtype[MACHINE_OWNER_TYPE_SIZE], stype[SUBNET_OWNER_TYPE_SIZE]; |
5eaef520 | 451 | EXEC SQL END DECLARE SECTION; |
452 | int status; | |
453 | ||
454 | if (q->type == RETRIEVE) | |
455 | return MR_SUCCESS; | |
456 | ||
457 | id = *(int *)argv[1]; | |
458 | ||
9e252e6f | 459 | if (q->type == APPEND && isdigit(argv[0][0])) |
460 | return MR_BAD_CHAR; | |
461 | ||
5eaef520 | 462 | EXEC SQL SELECT count(name) INTO :cnt from hostalias WHERE mach_id = :id; |
463 | if (dbms_errno) | |
464 | return mr_errcode; | |
465 | /* if the type is APPEND, this is ahal and we need to make sure there | |
466 | * will be no more than 2 aliases. If it's not, it must be dhal and | |
467 | * any owner will do. | |
468 | */ | |
469 | if (q->type == APPEND && cnt >= 2) | |
470 | return MR_PERM; | |
471 | EXEC SQL SELECT m.owner_type, m.owner_id, s.owner_type, s.owner_id | |
472 | INTO :mtype, :mid, :stype, :sid FROM machine m, subnet s | |
473 | WHERE m.mach_id = :id and s.snet_id = m.snet_id; | |
474 | status = find_member(mtype, mid, cl); | |
475 | if (status) | |
476 | return MR_SUCCESS; | |
477 | status = find_member(stype, sid, cl); | |
478 | if (status) | |
479 | return MR_SUCCESS; | |
480 | else | |
481 | return MR_PERM; | |
1beb5e23 | 482 | } |
7cf83f0f | 483 | |
484 | ||
7cf83f0f | 485 | /* access_snt - check for retrieving network structure |
486 | */ | |
487 | ||
5eaef520 | 488 | int access_snt(struct query *q, char *argv[], client *cl) |
7cf83f0f | 489 | { |
5eaef520 | 490 | if (q->type == RETRIEVE) |
491 | return MR_SUCCESS; | |
7cf83f0f | 492 | |
5eaef520 | 493 | return MR_PERM; |
7cf83f0f | 494 | } |
1a9a0a59 | 495 | |
496 | ||
497 | /* access_printer */ | |
498 | int access_printer(struct query *q, char *argv[], client *cl) | |
499 | { | |
500 | EXEC SQL BEGIN DECLARE SECTION; | |
501 | char type[PRINTSERVERS_OWNER_TYPE_SIZE]; | |
502 | int id, mach_id; | |
503 | EXEC SQL END DECLARE SECTION; | |
504 | int status; | |
505 | ||
506 | mach_id = *(int *)argv[PRN_RM]; | |
507 | EXEC SQL SELECT owner_type, owner_id INTO :type, :id | |
508 | FROM printservers WHERE mach_id = :mach_id; | |
509 | if (sqlca.sqlcode) | |
510 | return MR_PERM; | |
511 | ||
512 | status = find_member(type, id, cl); | |
513 | if (status) | |
514 | return MR_SUCCESS; | |
515 | else | |
516 | return MR_PERM; | |
517 | } |